---
type: Jurisdiction
title: "Rock County, WI"
classification: county
fips: "55105"
state: "WI"
demographics:
  population: 164350
  population_under_18: 36803
  population_18_64: 98279
  population_65_plus: 29268
  median_household_income: 75673
  poverty_rate: 9.26
  homeownership_rate: 71.16
  unemployment_rate: 3.76
  median_home_value: 231600
  gini_index: 0.4077
  vacancy_rate: 5.5
  race_white: 134161
  race_black: 7727
  race_asian: 1779
  race_native: 564
  hispanic: 16646
  bachelors_plus: 38594
sources:
  - field: demographics
    source: Census ACS 2023
confidence: official
tags: [jurisdiction, county, wi]
timestamp: "2026-07-03"
---

# Rock County, WI

County jurisdiction.

## Demographics (ACS 2023)

| Measure | Value |
| --- | --- |
| Population | 164350 |
| Under 18 | 36803 |
| 18–64 | 98279 |
| 65+ | 29268 |
| Median household income | 75673 |
| Poverty rate | 9.26 |
| Homeownership rate | 71.16 |
| Unemployment rate | 3.76 |
| Median home value | 231600 |
| Gini index | 0.4077 |
| Vacancy rate | 5.5 |
| White | 134161 |
| Black | 7727 |
| Asian | 1779 |
| Native | 564 |
| Hispanic/Latino | 16646 |
| Bachelor's or higher | 38594 |

## Source

- demographics: Census ACS 2023